脱硫石膏配制胶结材和混凝土的研究

以脱硫石膏、水泥、石子、砂子、外加剂为原料配制胶结材和混凝土,并研究了所配制的胶结材和混凝土的性能。结果表明:脱硫石膏经过烘干、筛分后,与水泥、高效减水剂混合能够作为胶凝材料。用脱硫石膏替代10%水泥配制成胶砂,其抗压、抗折强度均满足P.O42.5水泥的强度指标要求,凝结时间及安定性合格;采用脱硫石膏替代30%水泥,添加减水剂配制成混凝土,其强度满足C30混凝土指标要求,抗渗性能达到P12抗渗等级要求。本研究结果如果能够实施,既可以大量利用脱硫石膏,又可以解决环境污染。

The Research on Preparation of Binding Material and Concrete with Desulphurization Gypsum

The binding material and concrete are prepared by desulphurization gypsum,cement,stone,sand and admixture.The performances of the binding material are studied in the paper.The experimental results showed that it is absolutely feasible to prepare binding material by using cement,desulphurization gypsum and superplasticizer after drying and screening of desulphurization gypsum.The binding material was prepared by adding desulphurization gypsum replacing 10 percent cement and superplasticizer.the cement micellae compressive and bending strength of the binding material can meet the standard requirements of P.O42.5 and the binding material′s set time and soundness are up to standard.The concrete was prepared by adding desulphurization gypsum replacing 30 percent cement and superplasticizer.The concrete′s strength is up to standard of the C30 concrete,and its impermeability meets the requirements of P12.Implemention of the research result can not only massively use waste sludge desulphurization gypsum but also solve environmental pollution.